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Experimental method and device for step purification of powdered coal pyrolysis high temperature tar containing dusts

An experimental device and tar technology, applied in chemical instruments and methods, combined devices, separation methods, etc., to achieve the effects of improving dust removal efficiency, improving purification capacity, and increasing continuous working time

Inactive Publication Date: 2017-08-01
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide an experimental method and device for cascade purification of high-temperature dusty tar in pulverized coal pyrolysis, which overcomes some defects in the prior art and solves the problem of removal and separation of cohesive dust in tar

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  • Experimental method and device for step purification of powdered coal pyrolysis high temperature tar containing dusts

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Effect test

Embodiment 1

[0061] An experimental method for cascaded purification of high-temperature dust-containing tar from pulverized coal pyrolysis, the method comprising the following steps: feeding dust particles into a screw feeder through a hopper; packing solid filter material particles into a fixed-bed filter; Tar is added to the syringe pump, heated and gasified; nitrogen gas is introduced from the nitrogen bottle to the experimental system and enters the buffer tank; dust enters from the screw feeder, tar gas enters from the syringe pump, and from the buffer tank The incoming nitrogen gas is mixed and enters the cyclone separator, fixed bed filter, and condensation settler three-stage dedusting equipment in turn. The purified mixed gas is cooled by the cooler and the hydrocyclone to separate the purified tar, and the remaining nitrogen gas enters the circuit to continue Recycling; when sampling and measuring the dust removal efficiency of a certain level, open the glass fiber filter membran...

Embodiment 2

[0063] The above-mentioned experimental method for cascade purification of high-temperature dust-containing tar in pulverized coal pyrolysis, the described dust particles are fed into the screw feeder through the hopper, and the sieved experimental dust is weighed, and then added to the screw feeder after recording the mass. The hopper of the feeder, the dust particles are pulverized coal with a diameter of less than 100 μm, and the specific particle size range can be adjusted according to experimental requirements.

Embodiment 3

[0065] The above-mentioned experimental method for cascade purification of high-temperature dust-containing tar in pulverized coal pyrolysis, the described solid filter material particles are filled into the fixed bed filter, and the diameter is 0.38-0.83mm or 0.83-1.25mm or 1.25-2.5 The solid filter material of mm is added to the fixed bed filter, and the thickness of the particle layer of the filter material is controlled to be 5-25 cm. The solid filter material is semi-coke and quartz sand particles.

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Abstract

Provided is an experimental method and a device for step purification of powdered coal pyrolysis high temperature tar containing dusts. The method comprises the steps: adding dust particles into a screw feeder through a hopper; filling solid filter particles into a bed fixing filter; adding pure tar into an injection pump, heating the pure tar to gasification; introducing nitrogen gas from a nitrogen cylinder into an experimental system and into a buffer tank; introducing dusts through the screw feeder, introducing tar gas through the injection pump, after mixing the nitrogen gas introduced through the buffer tank with the dusts to obtain a mixture, and the mixture successively entering into three-level dust removing devices of a cyclone separator, the bed fixing filter, a condensation sedimentation device, cooling and separating purified gas mixture by a cooler and a cyclone hydraulic separator to obtain purified tar, introducing remaining nitrogen gas into a tail gas buffer tank, and pressing the remaining nitrogen gas into a nitrogen buffer tank through a gas booster pump driven by an air compressor to continue to use; and when sampling to measure dust removal efficiency of one level, opening a glass fiber filter membrane sampling apparatus connected with a bypass, and collecting and weighing intercepted dust to calculate the dust removal efficiency. The experimental method and the device for the step purification of the powdered coal pyrolysis high temperature tar containing the dusts are applied to step purification experiment study of high temperature tar gas containing the dusts.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of energy and chemical industry, and in particular relates to an experimental method and device for cascade purification of pulverized coal pyrolysis high-temperature dust-containing tar. [0003] Background technique: [0004] In the current Shaanxi coal chemical industry system, as the main resource for local economic and technological development—coal, it is mainly digested by coking to produce coke, which is a means of production for metallurgy and chemical industry. Over the years, various coking technologies and furnace applications have emerged, making great achievements in the development of this technology. However, with technological progress and environmental protection requirements, the technological development of this highly polluting and relatively lagging technology has encountered its development bottleneck. That is, as a by-product of tar with high economic value, due to the mixing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D50/00B01D5/00B01D53/00
CPCB01D53/002B01D50/20
Inventor 李云王黎闫孝红杜鑫齐彬彬
Owner XI AN JIAOTONG UNIV
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